Isa 27:2     In that day sing ye unto her, A vineyard of red wine.
3    I the LORD do keep it; I will water it every moment: lest any hurt it, I will keep it night and day.

     Do you recall that God setup His People of all twelve tribes as His Son's symbolic 'vineyard'? God planted it, and hedged out the weeds around it, cleared the stones away, and watered it. Yet His vineyard brought forth "wild grapes" instead of pure and goodly grapes of the best 'red wine' When it was time,

 God brought His Son Jesus Christ to be the fulfilment of that symbolic 'Red Wine' through His Blood of The New Covenant, so that Israel could return in bearing much fruit in Him to include believers from all peoples and nations.
     Our Lord's parable of the householder, vineyard, and husbandmen declares that God moved the care and responsibility over His vineyard (His People) to another "nation". Do you recall God's Message about that "nation" from the last Isaiah Chapter? I gave reference to Matthew 21:33-43 about The LORD taking His true Israel away from the "house of Judah" in Jerusalem, because they allowed the "crept in unawares” (Kenites) to kill His prophets, and then eventually crucified His Son upon the cross (John 8:13-59; all of Matt.23, especially 23:29-35). And because of those false ones who had been allowed to creep into true Judah's stay, most of the "house of Judah" in Jerusalem of that time rejected The Cornerstone Which has become The Head of the corner, i.e. Jesus Christ. God's Plan of Salvation was always meant not only for the believing children of Israel, but to Gentile believers also, thus His Israel was moved and put under the care of "other husbandmen", bringing forth "the fruits in their seasons" (Matt.21:41; Romans 8 through 11). This is how our LORD means "I the LORD do keep it...” The "it" means His "vineyard", which is symbolic of His People; not the land, but His People. Which People?

     For those who might be having a difficult time grasping the above, allow me to put this; another way. God setup Judah as His Law-giver,

 

 Psalms 60:7. Gilead is mine, and Manasseh is mine; Ephraim also is the strength of mine head; Judah is my lawgiver;

 

Genesis 49:10.  The sceptre shall not depart from Judah, nor a lawgiver from between his feet, until Shiloh come; and unto Him shall the gathering of people be.

 

That meant keeping the proper knowledge and fulfilling of God's Laws to His People among all the tribes of Israel. The sons of Aaron were to be His priests and teachers to His People, and the sons of Levi were to be helpers to the sons of Aaron, but the Levites would be divided in Jacob, and scattered among Israel,

 

Num.2. Read All

 

 Num.8:6-11. Read All:

 

Gen.49:5-7.  Read All.

 

Exod.24:12. And the Lord said unto Moses, Come up to me into the mount, and be there: and I will give thee tables of stone, and a law, and commandments which I have written; that thou mayest teach them.

 

 Moses being of Levi would be chosen by God to give the children of Israel His Law;

 

 Exod.2: Read All.